Vulnerability in Mozilla Firefox

CVE-2020-26978

Using techniques that built on the slipstream research, a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

EPSS: 0.013 (66.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

References

Frequently asked questions

What is CVE-2020-26978?
CVE-2020-26978 is a medium-severity vulnerability in Mozilla Firefox. CVSS score: 6.1/10. Published 2021-01-07.
How severe is CVE-2020-26978?
Medium severity. CVSS v3 base score is 6.1 out of 10.